As per initial reports, a unidentified man threw an explosive from a bridge in central Bangkok.

“The unidentified man threw the explosive near a busy pier on the city's Chao Phraya river and it landed in a canal,” said Colonel Natakit Siriwongtawan, deputy police chief of Klongsan district.

"If it did not fall in the water then it certainly would have caused injuries," he said.

Yesterday, 27 people, including four foreigners, were killed and 117 others injured in a powerful bomb blast inside a hugely popular Lord Brahma temple in a crowded area here today in the first such attack in the Thai capital.

The blast, which the government believed was aimed at damaging economy and tourism, occurred inside Erawan Shrine dedicated to Lord Brahma in the downtown Chidlom district.